Word family noun sufficiency adjective sufficient ≠ insufficient verb suffice adverb sufficiently ≠ insufficiently
From Longman Dictionary of Contemporary Englishinsufficientin‧suf‧fi‧cient /ˌɪnsəˈfɪʃənt◂/ ●●○ AWL adjective formal ENOUGHnot enough, or not great enough Insufficient resources have been devoted to the health service.insufficient for His salary was insufficient for their needs.insufficient (something) to do something The heating is insufficient to kill the bacteria. At the moment, there’s insufficient evidence to arrest anyone. —insufficiently adverb —insufficiency noun [singular, uncountable]Examples from the Corpus
insufficient• The bank charged me for having insufficient funds in my account.• There has been insufficient rainfall over the past two years, and farmers are having trouble.• an insufficient source of water• The data we have is insufficient to draw any conclusions.insufficient for• The planes had an insufficient fuel supply for a return flight. 